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Partners the option parser and the configuration parser together
read_all -- Set to True to read all configuration files up front.  
    Defaults to reading "on the fly" as the configuration files are
    needed.

src/h/a/haufe.hrs.configuration-0.5.18/haufe/hrs/configuration/service.py   haufe.hrs.configuration(Download)
            parser.add_file(cfgfile=filename, content=None)
 
        opts = parser.parse()
        self.opts = opts
        self.parser = parser